<template>
<!--  商品详情页-导航栏-->
  <div>
    <nav-bar>
      <div slot="left" class="back" @click="backClick">
        <img src = "~assets/img/common/back.svg" alt = "">
      </div>
      <div slot="center" class="title">
        <div v-for="(item,index) in titles"
             class="title-item"
             :class="{active: index == currentIndex}"
              @click="titleClick(index)">
          {{item}}</div>
      </div>
    </nav-bar>
  </div>
</template>

<script>
import NavBar from "components/common/navbar/NavBar";

export default {
  name: "DetailNavBar",
  components:{
    NavBar
  },
  data() {
    return{
      titles:['商品','参数','评论','推荐'],
      currentIndex:0,

    }
  },
  methods:{
    // 监听点击
    titleClick(index){
      this.currentIndex = index
      this.$emit('titleClick',index)
    },
    backClick(){
      // this.$router.go(-1)  go(-1)相当于back（）
      this.$router.back()
    }

  },
}
</script>

<style scoped>
  .title{
    display: flex;
  }
  .title-item{
    flex: 1;
  }
  .active{
    color: var(--color-high-text);
  }
  .back img{
    margin-top: 12px;
  }
</style>
